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Finding the Fourth Proportional to 15,481.09, 21,368.72 and 9,892.09

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Solution

The fourth proportional to 15,481.09, 21,368.72 and 9,892.09 is: 13,654.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.09 : 21,368.72 = 9,892.09 : x
  2. Step 2: Convert to fraction form
    15,481.09/21,368.72 = 9,892.09/x
  3. Step 3: Cross multiply
    15,481.09x = 21,368.72 × 9,892.09
  4. Step 4: Simplify right side
    15,481.09x = 211,381,145.12
  5. Step 5: Solve for x
    x = 211,381,145.12/15,481.09
  6. Step 6: Final answer
    x = 13,654.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.